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Ixiasoft
26.3.2.8.2. Supported ECC Features
The Error Correction Code (ECC) feature supports single-error correction, double-adjacent-error correction, and triple-adjacent-error correction in a 32-bit word. However, ECC cannot guarantee detection or correction of 4-adjacent-error and non-adjacent two-bit or more errors.
When ECC feature is enabled, the M20K runs slower than the non-ECC simple dual-port mode. You can enable optional ECC Pipeline Registers before the output decoder to achieve higher performance compared to non-pipeline ECC mode at the expense of one-cycle latency. Enabling ECC Pipeline Register will enabled the output register by default. The figure below illustrates the ECC block diagram for M20K memory block.